Piston Ring Installation Jig With Groove for Ring Gap Positioning
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Solution Overview
Problem
During the installation of a piston ring into a piston, the ring gap can cause the piston and piston ring to become damaged when attempting to insert the piston into a cylinder, as the ring ends protrude and get caught between the piston and the installer.
Innovation Solution
A piston ring installation jig is used, featuring a semi-cylindrical main body with a groove that accommodates a portion of the piston ring, allowing the ring gap to be positioned within the piston's ring groove, preventing damage during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the piston ring is expanded to install it on the piston, then the piston ring can be mounted on the piston, but the ring ends may protrude and get caught between the piston and installer causing damage
Solution Approach 1:
The groove is formed in advance on the inner peripheral surface of the installer, creating a predetermined receptacle for the ring ends before the actual installation process. This preliminary preparation ensures that when the piston ring is expanded and mounted, the ring ends are already positioned to be received by the groove, preventing them from protruding and causing damage during installation.
Solution Approach 2:
The groove acts as an intermediary structure between the piston ring and the installer. It provides a dedicated space that accommodates the ring ends, mediating the interaction between these components and preventing direct contact that would cause damage. The groove serves as a buffer zone that absorbs the protrusion of ring ends without transmitting harmful forces to the piston or installer.
2Ease of manufacture
If the diameter of the piston ring is expanded for installation, then the piston ring can be mounted on the piston, but distortion of the piston ring may occur during expansion
Solution Approach 1:
The groove serves as an intermediary structure that supports the piston ring during the expansion and installation process. By providing a receptacle for the ring ends, the groove maintains the structural integrity of the piston ring during expansion, preventing distortion while still allowing the necessary diameter increase for installation.
3Ease of operation
If the ring gap is not properly positioned during installation, then the installation process is simpler, but the piston and piston ring may become damaged
Solution Approach 1:
The groove design enables the installation system to be self-correcting. As the piston ring is expanded and installed, the ring ends automatically settle into the groove, which self-positionsthe ring gap in the correct location within the ring groove. This self-service mechanism eliminates the need for complex alignment procedures while ensuring proper positioning and preventing damage.
Solution Approach 2:
The groove acts as a positioning intermediary that guides the ring ends to their correct positions. By providing a physical receptacle, the groove mediates the positioning process, ensuring the ring gap is properly located within the ring groove without requiring complex external alignment tools or procedures.
Data Source
AI summary
A piston ring installation jig is to be used when installing a piston ring having a ring gap in a ring groove formed in an outer peripheral surface of a piston. The piston ring installation jig includes a main body including a groove. The main body has in a semi-cylindrical shape surrounding the outer peripheral surface of the piston. The groove has a substantially semicircular arc shape, and is formed in an inner peripheral surface of the main body in a region corresponding to the ring groove of the piston. A portion of the piston ring in a circumferential direction is inserted into the groove. The groove has a shape of an arc of a circle which has a circle center biased more to an outer peripheral side of the main body than a circle center of an inner peripheral surface of the main body.